INDUSTRIAL SCIENTIFIC M40 MULTIGAS DETECTOR

The M40 Oxygen, Carbon Monoxide, Hydrogen Sulfide, and Combustible Gas Monitor is ideal for personal monitoring and delivers high performance and reliability in harsh environments. The rugged, impact resistant housing also provides resistance to radio-frequency and electromagnetic interference. The four-button interface provides simple, intuitive operation and calibration, and its five-second " off" feature prevents unintentional shut-offs. Features: 1 to 4 gas monitoring for Oxygen ( O2) , Hydrogen Sulfide H2S) , Carbon Monoxide ( CO) & combustible gases ( LEL) Calibrated to NIST standards 18-hour runtime with lithium-ion battery Includes vibrating, 90dB audible, and LED visual alarms